Why is my oil light on?
What It Means
The oil light (often shaped like an oil can) indicates low oil pressure, not just low oil level. Oil pressure is critical for lubricating engine components. If pressure drops, metal parts can grind together, leading to rapid and expensive damage.
Common causes include low oil level, a failing oil pump, a clogged oil filter, a faulty oil pressure sensor, or an internal engine leak. In some cars, the light may also indicate low oil level, but pressure is the primary concern.
- Low oil level
- Faulty oil pressure sensor
- Failing oil pump
- Clogged oil filter
- Internal engine wear or leaks
What to Do
If the oil light comes on while driving, pull over safely and shut off the engine immediately. Check the oil level with the dipstick; if it's low, add oil to the correct level. If the light remains on after adding oil, do not drive the car—have it towed to a mechanic.
If the oil level is normal but the light is on, the issue is likely with the oil pressure sensor or pump. Driving with low oil pressure can destroy your engine in minutes, so it's not worth the risk.
- Stop the engine as soon as safe
- Check oil level and top off if needed
- If light persists, do not drive; tow to a shop
- Do not ignore the light, even if the engine seems to run fine
Common mistakes
- Assuming the oil light just means low oil and continuing to drive; it often indicates low pressure, which is more serious.
- Adding oil without checking the level first, which can lead to overfilling.
- Driving with the oil light on because the engine sounds normal; damage can occur quickly.
